Can a car charge the battery while idling?

[AxelLee]

Can a car charge the battery while idling? Yes, but the generator runs at a low speed and produces less electricity, resulting in a smaller charging current. Therefore, the charging effect is much worse compared to normal driving charging. If the charging indicator light is on while the car is idling, it means the battery is not charging and is still discharging. Normally, the charging indicator light should be on. Idling is not a speed but a working condition—when the engine runs without load, it is called idling. When the accelerator pedal is completely released while the engine is running, the engine enters an idle state. The engine speed during idling is called the idle speed, which can be adjusted by changing the throttle opening size.